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首页> 外文期刊>Journal of Molluscan Studies >Full stomachs at empty tides: tidal cycle affects feeding activity and diet of the sandy beach gastropod Olivella minuta
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Full stomachs at empty tides: tidal cycle affects feeding activity and diet of the sandy beach gastropod Olivella minuta

机译：空潮汐满肚子：潮汐循环影响喂养活动和饮食的沙滩加麻奥利维亚温丁塔

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摘要

Olivella minuta is an abundant neogastropod on sandy beaches from Texas (USA) to southern Brazil. This study aimed to characterize and compare the feeding activity and diet of a Brazilian population of O. minuta in different tidal zones (intertidal and subtidall, and different tidal levels (high and low tides), with three combinations of tidal zone and level being studied (intertidal during low tide, intertidal during high tide and subtidal). The results showed that diet composition was generally similar among tidal conditions, with O. minuta being a generalist, feeding on 45 different food items. Feeding activity, however, was higher in the intertidal during low tide, whereas the richness and diversity of food items were higher in the intertidal during high tide. The higher feeding activity of O. minuta during low tide may be linked to a lower risk of predation; at low tide organisms may be able to feed for a longer time, arid this may be particularly true on beaches with fine sand, where water retention is higher than that on beaches with coarse sand. The higher diversity of food items consumed in the intertidal during high tide is likely related to the increased prevalence of planktonic food during high tide. Our results indicate that tidal zone and level may strongly influence the feeding activity of coastal soft-bottom species and that species may show higher feeding activity during low tide. Given the current loss of intertidal habitats due to anthropogenic activity and climate-change associated factors, our study has important implications, highlighting the importance of intertidal areas for the ecology and conservation of sandy beach species.
机译：Olivella Minuta是一家来自德克萨斯（美国）的沙滩上的一个充足的Neogastropod到巴西南部。本研究旨在表征和比较不同潮汐区（潮间和晶状体和不同潮汐水平（高低潮汐水平（高潮汐水平）的巴西人群的饲养活动和饮食，其中有三种潮汐区和水平的组合（在低潮期间透际，在高潮和阴性期间跨潮）。结果表明，饮食组合物在潮气条件下均相似，O. Minuta是一般主义者，喂养45种不同的食品。然而，喂养活性较高在低潮期间跨境，而食物的丰富性和多样性在高潮期间延迟较高。低潮中O. Minuta的较高喂养活性可能与较低的捕食风险相关;在低潮中可能是能够饲养更长的时间，干旱在具有细沙的海滩上可能尤其如此，水潴留高于粗砂的海滩上的水。食物的多样性在高潮期间跨境消耗的物品可能与高潮期间浮游食品的流行增加有关。我们的结果表明，潮汐区和水平可能强烈影响沿海软底物种的饲养活性，并且该物种在低潮中可能显示出更高的喂养活性。鉴于由于人为活性和气候变化相关因素导致的透际栖息地失去，我们的研究具有重要意义，突出了界京界京生态和保护沙滩物种的重要性。

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  • 来源
    《Journal of Molluscan Studies》 |2020年第3期|共9页
  • 作者

    Checon Helio H.; Silva Mariana O.; Corte Guilherme N.; Yokoyama Leonardo Q.; Teodosio M. Alexandra; Turra Alexander;

  • 作者单位

    Univ Sao Paulo Inst Oceanog Praca Oceanog 191 BR-05508120 Sao Paulo Brazil;

    Univ Sao Paulo Inst Oceanog Praca Oceanog 191 BR-05508120 Sao Paulo Brazil;

    Univ Sao Paulo Inst Oceanog Praca Oceanog 191 BR-05508120 Sao Paulo Brazil;

    Univ Fed Sao Paulo Lab Ecol &

    Gestao Costeira Inst Mar Rua Carvalho de Mendonca 144 BR-14411070 Santos SP Brazil;

    Univ Algarve FCT CCMAR Campus Gambelas P-8005139 Faro Portugal;

    Univ Sao Paulo Inst Oceanog Praca Oceanog 191 BR-05508120 Sao Paulo Brazil;

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  • 正文语种 eng
  • 中图分类 动物学;
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